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TECHNICAL 1 DATA

RELATIVE HUMIDITY SENSOR HS 1100 / HS 1101

TECHNICAL 1 DATA
RELATIVE HUMIDITY SENSOR HS 1100 / HS 1101
Based on a unique capacitive cell, these relative humidity sensors are designed for high volume, cost sensitive applications such as office automation, automotive cabin air control, home appliances, and industrial process control systems. They are also useful in all applications where humidity compensation is needed.
FEATURES
Full interchangeability with no calibration required in standard conditions Instantaneous desaturation after long periods in saturation phase Compatible with automatized assembly processes, including wave soldering, reflow and water immersion (1) High reliability and long term stability Patented solid polymer structure Suitable for linear voltage or frequency output circuitry Fast response time Individual marking for compliance to stringent traceability requirements
(1) soldering temperature profiles available on request
HS 1100 Top opening
Ratings Symbol Value Unit
OPERATING RANGE
HS 1101 Side opening
Ta Tstg Vs RH t
-40 to 100 -40 to 125 10 0 to 100 10
ND ITI ON
CHARACTERISTICS
TEMPERATURE IN °C
Characteristics
Symbol
Unit.
Tighter specification available on request
HPC001 Rev. 7 June 2002
TECHNICAL 2 DATA
Typical response curve of HS 1100 / HS 1101 in humidity
capacitance (in pF)
Measurement frequency influence
In this data sheet, all capacitance measurements are @ 10kHz. However, the sensor can operate without restriction from 5kHz to 100kHz. To calculate the influence of frequency on capacitance measurements :
In order to get a better reproducibility during measurements, always connect the case of the header (pin 2) to the ground of the circuit. The case of the header is located on the opposite side of the tab.
Soldering instructions :
see the Application Note HPC007
PROPORTIONAL VOLTAGE OUTPUT CIRCUIT
DEMO BOARD AVAILABLE ON REQUEST (REF HM1510)
Typical Characteristics for Voltage Output Circuit
At Vcc 5V - 25°C RH Voltage (V)
HPC001 Rev. 7 June 2002
TECHNICAL 3 DATA
FREQUENCY OUTPUT CIRCUITS
COMMENTS
3.5 TO 12V
R2 576K
R4 49.9K R3 1K
DC 2 TR TLC555 5 CV TH
This circuit is the typical astable design for 555. The HS1100 / HS1101, used as variable capacitor, is connected to the TRIG and THRES pin. Pin 7 is used as a short circuit pin for resistor R4. The HS1100 / HS1101 equivalent capacitor is charged through R2 and R4 to the threshold voltage (approximately 0.67Vcc) and discharged through R2 only to the trigger level (approximately 0.33Vcc) since R4 is shorten to ground by pin 7. Since the charge and discharge of the sensor run through different resistors, R2 and R4, the duty cycle is determined by :
HS11XX
BILL OF MATERIAL AVAILABLE ON REQUEST
REMARK
555 Type
TLC555 (Texas) TS555 (STM) 7555 (Harris) LMC555 (National)
909k 100nF capacitor 1732k 1238k
576k 523k 549k 562k
Typical Characteristics for Frequency Output Circuits
Measurement Error vs Stray Capacitance
A special attention is required in order to minimize stray capacitance in the layout. The added capacitance will act as a parallel capacitance with the sensor and create a measurement error.
HPC001 Rev. 7 June 2002
TECHNICAL 4 DATA
All these tests are regularly performed on different lots from production. More information are available on request Environmental and recycling information - HS1100 / HS1101 sensors are lead free components - HS1100 / HS1101 sensors are free of Cr (VI), Cd and Hg.
PACKAGE OUTLINE HS1100
Dim Min (mm) Max (mm)
Min (mm)
Max (mm)
9.00 9.30 8.00 8.50 3.50 3.90 12.00 14.00 0.40 0.50 45° BCS 0.70 1.10 0.70 0.90 4.83 5.33
PACKAGE OUTLINE HS1101
9.70 10.20 5.70 6.20 0.40 0.60 12.00 14.00 0.40 0.50 45° BCS 0.70 1.10 0.70 0.90 4.83 5.33
ORDERING INFORMATION : HS 1100 : HPP 800 A 001 (MULTIPLE PACKAGE QUANTITY OF 50 PIECES) HS 1101 : HPP 801 A 001 (MULTIPLE PACKAGE QUANTITY OF 48 PIECES) CAPACITIVE RELATIVE HUMIDITY SENSOR.
SAMPLE KIT OF HS1100-HS1101 IS AVAILABLE THROUGH HUMIREL WEB SITE
www.humirel.com
email : sales@humirel.com
HPC001 Rev. 7 June 2002